Hi!!
I'm generating the pwm square pulses using arduino and amplifying the arduino output to about 0-25v,30v(variable) using opamp also using the current limiter(<2ma). I want biphasic waveforms at this point. so i can get +-25v that can be variable.
Please tell me how it can be possible.
Thanks in advance.
Negative voltage is discussed here
http://forum.arduino.cc/index.php?topic=22651.0
Are you building a defibrillator? Because if you are, I have to say it doesn't sound like a very good idea.
Thanks for your time.
And no i'm not making defibrillator. I want this voltage for my electro acupuncture device. I'm designing this for varibale amplitude of lets say 20v with <2ma current.